Electrosynthesis and physicochemical properties ofα-PbO_2-CeO_2-TiO_2 composite electrodes  

α-PbO_2-CeO_2-TiO_2复合电极材料的电合成及物化性能(英文)

作　　者：陈步明[1] 郭忠诚[1,2] 徐瑞东[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]昆明理工恒达科技有限公司,昆明650105

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第4期1191-1198,共8页中国有色金属学报（英文版）

基　　金：Project(51004056) supported by the National Natural Science Foundation of China;Project(KKZ6201152009) supported by the Opening Foundation of Key Laboratory of Inorganic Coating Materials,Chinese Academy of Sciences;Project(2010ZC052) supported by the Applied Basic Research Foundation of Yunnan Province,China;Project(20125314110011) supported by the Specialized Research Fund for the Doctoral Program of Higher Education;Project(2010247) supported by Analysis & Testing Foundation of Kunming University of Science and Technology,China

摘　　要：In order to investigate the effect of solid particles dopants on physicochemical properties of α-PbO2 electrodes, a-PbO2 composite electrodes doped with nano-TiO2 and nano-CeO2 particles were respectively prepared on A1/conductive coating electrodes in 4 mol/L NaOH solution with addition of PbO until saturation by anodic codeposition. The electrodeposition mechanism, morphology, composition and structure of the composite electrodes were characterized by cyclic voltarnmogram （CV）, SEM, EDAX and XRD. Results show that the doping solid particles can not change reaction mechanism of α-PbO2 electrode in alkaline or acid plating bath, but can improve deposition rate and reduce oxygen evolution potential. The doping solid particles can inhibit the growth of a-PbO2 unit cell and improve specific surface area. The diffraction peak intensity of a-PbO2-CeO2-TiO2 composite electrode is lower than that of pure a-PbO2 electrode. The electrocatalytic activity of a-PbO2-2.12%CEO2-3.71%TIO2 composite electrode is the best. The Guglielmi model for CeO2 and TiO2 codeposition with a-PbO2 is also pronosed.采用电化学阳极复合电沉积技术,将纳米TiO_2和CeO_2颗粒加入氧化铅中并溶入4 mol/L NaOH溶液中至饱和,在铝基体上制备α-PbO_2-CeO_2-TiO_2复合镀层。利用循环伏安(CV)、扫描电镜(SEM)、能谱(EDAX)和X射线衍射(XRD)分析复合电极的沉积机理、表面形貌、成分及结构。结果表明:在酸、碱性镀液中,掺杂固体颗粒不会改变α-PbO_2电极的反应机理,但能提高沉积速率和降低析氧电势。掺杂固体颗粒能抑制α-PbO_2晶胞的长大,增大镀层的比表面积,且掺杂固体颗粒的复合镀层的衍射峰强度比未掺杂的α-PbO_2镀层的低很多。α-PbO_2-2.12%CeO_2-3.71%TiO_2复合电极材料的析氧催化活性最好。提出了两种颗粒的复合共沉积模型。

关 键 词：A1 lead dioxide composite electrodes ELECTROCATALYSIS physicochemical property 

分 类 号：O611.4[理学—无机化学]